On multiple computers, with Windows 7 Ultimate, I now have difficulties switching between wireless networks or connecting to airport/hotel networks. This was never a problem with Vista – could switch between networks easily and did not have problems when Windows 7 was first installed. My Windows 7 network consists of ATT wireless router/DSM modem and a Belkin wireless router/cable modem, IPAQ PC with Belkin USB wireless adapter, Acer Laptop with Aethros wireless adapter, Acer Netbook. Also have XP PC with Ethernet connection to the Belkin Router/Cable Modem. All drivers are up to date and the Belkin router is new. I also tried a new D-link router with no success at all. The Network and Sharing Center shows the available wireless networks. Whenever, I try to change networks, the non-preferred network comes up unknown and will not show internet connection. Running troubleshooter switches back to the preferred network. I can switch to the second network, by making it the preferred network and running home group and network trouble shooters. When I switch back to the original network, Windows 7 does not remember that it was a Home network. When traveling, it is a major production connecting to airport/hotel networks. With Vista, switching could be done in a few seconds. Any ideas?